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US 11,002,178 B1Granted
Methods and systems for a pre-chamber
AssigneeFord Global Technologies, LLC
InventorXiaogang Zhang
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for a pre-chamber. In one example, a pre-chamber comprises a plurality of venturi passages fluidly coupling it to a primary combustion chamber. The plurality of venturi passages may be configured to assist in drawing out residual gases from a previous combustion event during a current combustion event.
Claims20
A system comprising:
- a pre-chamber configured to eject a mixture to a primary combustion chamber via a plurality of venturi passages, the pre-chamber further comprising a plurality of air paths arranged above a plurality of openings of a fuel injector relative to a central axis of the pre-chamber.
An engine, comprising:
- a primary combustion chamber comprising a volume defined by a cylinder head, interior cylinder walls, and a piston upper surface;
- a pre-chamber arranged within the volume and coupled to the cylinder head, wherein a pre-chamber volume is separated from the volume via pre-chamber walls, wherein the pre-chamber volume is fluidly coupled directly to the volume via a plurality of venturi passages and a plurality of air paths;
- and
- a fuel injector positioned to inject directly into the pre-chamber volume between the plurality of venturi passages and the plurality of air paths and a spark plug positioned to provide spark within the pre-chamber volume.
1 more element
A system of an engine, comprising:
- a primary combustion chamber comprising a piston configured to oscillate therein;
- a pre-chamber comprising a fuel injector positioned to inject fuel directly therein, the pre-chamber further comprising a spark plug positioned to provide a spark directly therein, wherein the pre-chamber is arranged below a cylinder head within a volume of the primary combustion chamber;
- wherein a plurality of venturi passages fluidly couple the pre-chamber to the volume of the primary combustion chamber, wherein each of the plurality of venturi passages comprises a venturi throat coupled to an interior passage of a plurality of interior passages, wherein the interior passage fluidly couples the venturi throat to a bottom half volume of the pre-chamber, further comprising a plurality of air paths arranged between an injection point of the fuel injector and the cylinder head.
Dependencies are inferred from the claim text.